Suspension means for refractory tile



June 24, 1958 E. B. WOLF 2,840,017

SUSPENSION MEANS FOR REFRACTORY TILE Filed April 13. 1954 IN V EN T 0R..Z'rzres? .5. 144. 7:

United States Patent ()fiice 2,840,017 Patented June 24, 1958 2,840,017SUSPENSION MEANS FOR REFRACTORY TILE Ernest B. Wolf, Detroit, Mich.,assignor to Bigelow- Liptak Corporation, Detroit, Mich., a corporationof Michigan Application April 13, 1954, Serial No. 422,868

4 Claims. (Cl. 110-99) This invention relates in general to suspendedroofs, arches, and the like for industrial furnaces such as boilers,open-hearths, and the like and, more particularly, to a novel andimproved suspending means for refractory tile that is used in thesefurnaces. The invention is particularly useful in suspended basic roofsand arches.

The primary object of this invention is to provide an improved tilesuspension construction which results in no waste volume at the top ofthe tile, which applies lateral pressure between adjacent tile, andwhich is relatively easy and inexpensive to make and use. The presentinvention provides an elongated hanger plate, preferably made from analloy steel plate stock, which is provided with an aperture on the upperend thereof above the top of the tile that is adapted to receive asuitable supporting strap or hook. Thehanger plate is'provided with anoutwardly extending tab disposed below the aperture. The lower end ofthe hanger plate is adapted to be placed in the die and embedded in therefractory tile material, such as the well known chemically bondedmagnesite compositions used in making basic refractories, up to and intoan abutting position with said tab, and the'magnesite forced around theplate under high pressure in the die. The lower embedded end of thehanger plate is provided with a plurality of outwardly extending tabs orprongs which anchor the plate in the tile. The hanger is molded underpressure with the refractory material and thus is firmly attached to thefinished tile. The hanger strap or hook means may be supported by asuitable hanger rod which may be locked above the top of the furnacearch and cooled by natural convection of air. The hanger rod be made ofheat resisting steel or cast iron to withstand undue temperatures andmay be supported in any suitable manner. For example, they may besupported by a roof truss structure. The novel hanger plates arepreferably embedded in the refractory tiles with the aperture thereinextending from the upper side thereof and offset from the midplanethereof so as to permit one hanger strap or hook to support twoadjacently disposed refractory tiles with pressure applied by each brickto the other along the contacting faces.

Other objects, features and advantages of the present invention willbecome apparent from the following description taken in conjunction withthe drawings wherein:

Figure 1 is an isometric view showing a fragmentary portion of asuspended furnace arch, roof, etc, embodying a refractory tilesuspension made in accordance with the principles of the presentinvention;

Fig. 2 is an elevational view, partly in section, of the structureillustrated in Fig. 1, taken along the line 2--2 thereof;

Fig. 3 is an elevational view similar to the view of Fig. 2, butillustrating a modified hanger plate; and

Fig. 4 is an isometric view of a hanger plate made in accordance withthe principles of the present invention.

Referring now to the drawings, the illustrative embodiment comprises ahanger bar 2 on which is detachably mounted a plurality of refractorytile hangers 4 which may be of any desired shape. The illustrated typeof tile hangers 4 are provided with an upper hook-shaped end 6, adaptedto permit the hangers to be easily removed from the hanger bar 2, and alower hook-shaped end 8 adapted to detachably support a pair of tilehanger plates 10, each carrying a refractory tile 12. It will beunderstood that a suspended furnace roof or arch made in accordance withthe invention would be comprised of a plurality of hangers bars 2, tilehangers 4, tile hanger plates 10, and tiles 12 supported by any suitableconventional holding means, such as a series of I-beams resting on theside walls of the furnace and supporting the hanger bars 2. The hangerbar 2 is circular in cross section and may be made from materialsuitable for any particular requirement as from either an alloy steel orcast iron.

As is best seen in Figs. 2 and 3, the tile hanger 4 is preferably madewith an upper hook-shaped end 6 which may be detachably mounted on thehanger bar 2 so as to permit the installation of the tile hanger plates10 on the lower hook-shaped end 8. The hook-shaped end 6 is preferablymade with an open portion, as designated by the numeral 9, to permit thetile hanger 4 to be easily and quickly removed from the hanger bar 2.

The tile hanger plate 10 is preferably made from a suitable heatresisting alloy steel which will not oxidize during manufacture of thetile or in operation of the furnace and is substantially rectangular inshape with the upper end thereof being rounded off as at 13. An aperture14 is provided in the upper end of the hanger plate 10 and is adapted toslidably receive the lower hookshaped end 8 of the tile hanger 4. Theaperture 14 is provided with an outwardly extending reinforcing flange16, suitably formed therein or secured therein and adapted to providethe upper end of the plate with greater strength for carrying arefractory tile. Disposed below the aperture 14 is an outwardlyextending integral tab or flange 18 preferably formed by punching it outof the hanger plate 10 and bent to the desired angle.

As is best seen in Fig. 2, the outwardly extending tab 18 is adapted toabut the upper surface 20 of the refractory tile 12 to resist thetendency to move toward a vertical position. Disposed below the flange18 and em bedded in the tile are two longitudinally spaced, outwardlyand upwardly extending integral tabs or flanges 22 and 24. The tabs 22and 24 extend outwardly and upwardly from the plate 10 at an acute angleand may be formed by any suitable means as by punching them out of thetile hanger plate 10. It will be seen that the outwardly extending tabs22 and 24 are adapted to resist any tendency of the hanger plate 10 tobe pulled out of the refractory tiles 12. Although only two tabs 22 and24 are shown, it will be obvious that a greater number could beprovided, if desired.

In operation, after the tile hanger plates 10 have been formed, if usedwith pre-burned tile as contrasted with chemically bonded compositionsmentioned above, they are embedded in the refractory tile before it isfired and held in proper position by any suitable means during firing.As is best seen in Fig. 2, the hanger plate 10 may be embedded in therefractory tile 12 in an angular position with the upper end 13 thereofdisposed on the centerline of the oxidizable spacer plates 26 disposedbetween the pair of basic tiles 12. The two adjacently disposedrefractory tiles 12 may then be supported on one tile hanger 4 bypositioning the tiles so as to have the upper ends 13 of the tile hangerplates 10 disposed in an abutting position. Since the point ofsuspension is ofifset from the midplane (containing the C. G.) the twotiles will be forced against each other with a pressure de- 3 pendent onthe amount of offset. Such pressure is desired so that the spacers andtile material will form high melting point refractory compounds andfluxing out of the spacers will be avoided.

The modification ofFig. 3 shows a pair of refractory tiles provided withtile hanger plates 27 made in accordance with the present invention andwhich are similar tothe tile hanger plates shown in the illustration ofFig. 2. In this modification, the tile hanger plates 27 have been bentat a point generally designated as 28, which permits the upper portionof the tile hanger plates to be disposed in a vertical plane along theadjacent edges of a pair of refractory tiles 12, so as to be easilyassembled onto the tile-hanger 4. The tile hanger plate 27 is providedwith tabs 30, 32, and 34 similar in shape and function to the tabs 18,22, and, 24 of the tile hanger plate 10 In constructing a suspendedfurnace arch O1 roof in accordance with the principles of the invention,the hanger bars 2 are supported in any suitable manner. For example,they may be supported by a roof truss structure. The refractory tiles 12may then be hung on the bars 2 in any suitable order. Preferably, a pairof tiles 12 are placed so as to bring the upper ends 13 of the tilehanger plates into an adjacent position and then the lower hookshapedend 8 of the tile hanger 4 is inserted through the apertures 14 of theadjacently disposed hanger plates. The refractory tiles 12 are then heldtogether and lifted to a position beneath the hanger bar 2. In order toengage the tile hanger. 4 on the bar 2, the hanger 4 may be rotated soas to permit the hook-shaped upper end 6 to be passed above and down onthe hanger bar 2.

While it is apparent that the present invention is Well calculated tofulfill the objects above stated, it will be understood that theinvention is subject to modification, variation and change withoutdeparting from the proper spirit or scope of the invention.

What is claimed is:

1. In a suspended furnace construction, the combination of, alongitudinally extending hanger bar, a plurality of tile hangersdetachably suspended from said bar, a pair of refractory tiles disposedbelow each tile hanger, a

hanger plate embedded and molded in each of said tiles, each of saidhanger plates comprising an elongated platelike member having an upperend extending upwardly from the tile, means on said upper end adapted tooperatively connect the hanger plate to the tile hanger, an outwardlyextending tab on said member disposed below said means, said memberbeing embedded in the tile up to and into an abutting position with saidtab, the embedded portion of said member being provided with a pluralityof outwardly and upwardly extending tabs adapted to interlock saidmember in the refractory tile.

2. The invention as set forth in claim 1, wherein the tab on said memberbelow said means extends outwardly and downwardly at an acute angle fromsaid member.

3. The invention as set forth in claim 1, wherein the tab on said memberbelow said means extends outwardly at a right angle from said member.

4. A tile hanger plate adapted for use in suspending refractory tilesina suspended furnace arch or the like comprising, an elongated plate-likemember having an outwardly extending tab dividing said member into anupper portion and a lower portion, said portions having an includedangle between them of substantially more than degrees, said upperportion having means thereon for attachment to a tile hanger, said lowerportion being being adapted to be embedded in a refractory tile up toand into an abutting position with said tab, said lower portion beingprovided with a plurality of outwardly extending tabs struck out fromthe lower portion adapted to interlock said member in the refractorytile.

References Cited in the file of this patent UNITED STATES PATENTS2,120,133 Kohler June 7, 1938 2,158,759 Morloclc May 16, 1939 2,187,669Stewart Jan. 16, 1940 2,317,451 Giles Apr. 27, 1943 2,398,622 CrncichApr. 16, 1946 2,517,876 Heuer Aug. 8, 1950 2,547,322 Heuer Apr. 3, 1951

